diff -up wabt-1.0.10/CMakeLists.txt.orig wabt-1.0.10/CMakeLists.txt
--- wabt-1.0.10/CMakeLists.txt.orig	2019-03-15 12:53:00.645283108 +0100
+++ wabt-1.0.10/CMakeLists.txt	2019-03-15 12:55:50.734311159 +0100
@@ -425,7 +425,7 @@ if (NOT EMSCRIPTEN)
     endif ()
 
     # test running
-    find_package(PythonInterp 2.7 REQUIRED)
+    find_package(Python COMPONENTS Interpreter REQUIRED)
     set(RUN_TESTS_PY ${WABT_SOURCE_DIR}/test/run-tests.py)
     add_custom_target(run-tests
       COMMAND ${CMAKE_BINARY_DIR}/wabt-unittests
diff -up wabt-1.0.12/test/run-spec-wasm2c.py.orig wabt-1.0.12/test/run-spec-wasm2c.py
--- wabt-1.0.12/test/run-spec-wasm2c.py.orig	2019-09-25 23:04:14.000000000 +0200
+++ wabt-1.0.12/test/run-spec-wasm2c.py	2019-10-09 10:14:41.905966919 +0200
@@ -98,6 +98,8 @@ def MangleName(s):
     result = 'Z_'
     for c in s.encode('utf-8'):
         # NOTE(binji): Z is not allowed.
+        if type(c) == int:
+            c=chr(c)
         if c in '_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXY0123456789':
             result += c
         else: